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KVM: x86 emulator: support byte/word opcode pairs

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Many x86 instructions come in byte and word variants distinguished with bit
0 of the opcode.  Add macros to aid in defining them.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Avi Kivity 2010-08-26 11:56:06 +03:00
parent 081bca0e6b
commit 8d8f4e9f66
1 changed files with 6 additions and 0 deletions
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6
arch/x86/kvm/emulate.c
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@ -2330,6 +2330,9 @@ static int em_rdtsc(struct x86_emulate_ctxt *ctxt)
#define GD(_f, _g) { .flags = ((_f) | Group | GroupDual), .u.gdual = (_g) } #define GD(_f, _g) { .flags = ((_f) | Group | GroupDual), .u.gdual = (_g) }
#define I(_f, _e) { .flags = (_f), .u.execute = (_e) } #define I(_f, _e) { .flags = (_f), .u.execute = (_e) }
#define D2bv(_f) D((_f) | ByteOp), D(_f)
#define I2bv(_f, _e) I((_f) | ByteOp, _e), I(_f, _e)
static struct opcode group1[] = { static struct opcode group1[] = {
X7(D(Lock)), N X7(D(Lock)), N
}; };
@ -2572,6 +2575,9 @@ static struct opcode twobyte_table[256] = {
#undef GD #undef GD
#undef I #undef I
#undef D2bv
#undef I2bv
static unsigned imm_size(struct decode_cache *c) static unsigned imm_size(struct decode_cache *c)
{ {
unsigned size; unsigned size;